Amkor Technology (NASDAQ: AMKR) delivered a quarter that was less a beat and more a statement. Revenue of $1.90 billion rose 26% year-over-year and cleared the $1.81 billion consensus by nearly $90 million. GAAP diluted EPS of $0.70 more than tripled from $0.22 a year ago and landed a full $0.23 above the $0.47 estimate. This was not a timing benefit or an easy comp. The prior-year quarter included a $32 million contingency payment that inflated operating income, meaning the underlying improvement is even larger than the headline comparison suggests.
The driver is unmistakable: advanced packaging for AI and high-performance computing. Advanced products revenue hit $1.56 billion, up 27% YoY, and now represents 82% of total net sales, up from 81% in Q1 and 81% in the year-ago period. The Computing end market posted record revenue, as did Automotive & Industrial. Communications remained the largest segment at 42% of sales, but the mix shift toward higher-value packaging is accelerating. Gross margin expanded 480 basis points YoY to 16.8%, and operating income more than doubled to $200 million, producing an operating margin of 10.5% versus 6.1% a year ago.
The margin story deserves closer attention. Cost of sales as a percentage of revenue declined across every line item: materials fell to 52.6% from 52.9%, labor dropped to 10.0% from 11.7%, depreciation eased to 8.6% from 9.6%, and other manufacturing costs fell to 12.0% from 13.8%. This is not a single-factor improvement. Labor leverage suggests higher utilization rates are absorbing fixed headcount. The depreciation decline as a percentage of sales implies revenue is growing faster than the asset base is depreciating — a sign that the capacity added in prior periods is now being filled. The 480bp gross margin expansion looks structural rather than cyclical, driven by mix and utilisation rather than one-off pricing.
Q3 guidance reinforces that view. The company expects net sales of $1.95 billion to $2.05 billion, which at the midpoint implies sequential growth of about 5% and year-over-year growth of roughly 20%. Gross margin is guided to 18.5%–19.5%, above Q2's 16.8%, suggesting further operating leverage. Diluted EPS guidance of $0.72–$0.82 at the midpoint would represent another sequential increase. Management is not signalling caution here. The guidance range sits comfortably above the just-reported quarter.
The capex story is the counterweight. Full-year 2026 capital expenditures are guided to $2.5 billion–$3.0 billion, up sharply from the $688 million spent in the first six months. That implies a second-half spending ramp that will test free cash flow. The balance sheet can absorb it — total cash and short-term investments of $2.5 billion match total debt of $2.5 billion — but the pace of investment is aggressive for a company that generated $382 million in operating cash flow in the first half. The bet is that the capacity being built today will be filled by AI-driven demand tomorrow. Given the Q2 print and Q3 guidance, that bet is looking well-timed.
What to watch next quarter is whether the gross margin trajectory continues to improve as the mix shifts further toward advanced products, and whether the capex ramp begins to pressure free cash flow conversion. For now, Amkor is executing on the AI theme with precision, and the numbers back up the narrative.